Improvement in window-ventilators



A. LAMMERT. Window-Ventilator.

No. 213,337. Patented Mar. 18,1879.

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UNITED STATES PATENT QFFIGE.

AUGUST LAMMERT, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN WINDOW-VENTILATORS.

Specification forming part of Letters Patent No. 213,337, dated March18, 1879; application filed March 23, 1878.

To all whom it may concern:

Be it known that I, AUGUST LAMMERT, of Chicago, in the county of Cookand State of Illinois, have invented a new and ImprovedWindow-Ventilator, as fully described in the following specification.

My invention relates to a ventilating-register arranged in awindow-pane; and consists in providing a window-pane with a centralannular recess having a circumferential flange, a central bearing, andsector-shaped openings, in whiclr recess is applied a glass registerflush with the pane, having sector-shapedopenings and pivotal andoperating pins, as hereinafter more fully set forth.

In the drawings, Figure 1 represents an elevation, and Fig.2 atransverse section, of my ventilator.

A is a plate of glass, to be of such exterior dimensions that it willfit in the place of one of the windowsash lights. This plate has anannular recess in one, and a corresponding projecting flange, (1, uponthe other, side. Into this recess is placed a rotating disk, B, alsomade of glass, and secured by afulcrum. pin or bolt, 0, passed throughplate A, disk B, and the central bearing 0, upon which said disk willturn. Both the recessed portion of the glass plate A and the disk B areperforated by holes shaped like the sectors of a circle, which areequally spaced, so that the solid portions of said disk will cover andclose the open portions in the plate, and that by turning said disk theopenings in both will meet. A small knob, I), either formed on oraflixed to the disk-rim, is a means for turning said disk 13. Smallwashers of elastic material may be placed under the head of thefulcrum-holt G, to prevent rattling and breakage. Ventilation and lightare equally desirable in the rooms of a building, and one should not besecured at the expense of the other, as heretofore, when metallic platesarranged with ventilating-registers were put in place of one of theglasses in a window-sash, while with my device the entrance of the lightinto a room is not lessened, and yet the admittance of fresh air isprovided for.

I am aware that a ventilator constructed by cutting out suitableorifices in a pane of glass or other transparent substance, and applyingthereon a movable disk of a transparent ma terial having similarorifices, has heretofore been employed; and I am also aware that aventilator consisting of a flanged transparent plate with aregister-plate, both having ventilating-openings, is not new, and Itherefore lay no claim to such inventions.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The window-pane A, provided with a central annular recess having theprojecting flange a, the central bearing, 0, and sector-shaped opeirings, in combination with the trans 'iarent register B, inserted in therecess and flush with the pane, and provided with sector-shapedopenings, the pivotal pin 0, and operatingpin b, substantially asdescribed, and for the purpose set forth.

AUGUST LAMMERT.

Witnesses:

' GEO. FROMMANN,

JACOB RICHTER.

